SVNからのミラー

main.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+
+int main() {
+  int sock;
+  struct sockaddr_in srv;
+  struct addrinfo hints, *addr;
+
+  char pas[256];
+  char res[10];
+  int reslen = 0;
+
+  memset(&hints, 0, sizeof(hints));
+  hints.ai_family = AF_INET; // IPv4
+  hints.ai_socktype = SOCK_STREAM; // TCP
+
+  int status = getaddrinfo("076.moe", NULL, &hints, &addr);
+  if (status != 0) {
+    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+    exit(1);
+  }
+
+  sock = socket(AF_INET, SOCK_STREAM, 0);
+  if (sock == -1) {
+    perror("ソケットを作成に失敗");
+    exit(1);
+  }
+
+  srv.sin_addr = ((struct sockaddr_in *)(addr->ai_addr))->sin_addr;
+  srv.sin_family = AF_INET;
+  srv.sin_port = htons(9951);
+
+  freeaddrinfo(addr);
+
+  if (connect(sock, (struct sockaddr *)&srv, sizeof(srv)) < 0) {
+    perror("接続に失敗");
+    close(sock);
+    exit(1);
+  }
+
+  printf("パスワード: ");
+  fgets(pas, sizeof(pas), stdin);
+  pas[strcspn(pas, "\n")] = 0;
+
+  if (send(sock, pas, strlen(pas), 0) < 0) {
+    perror("送信に失敗");
+    close(sock);
+    exit(1);
+  }
+
+  reslen = recv(sock, res, sizeof(res) -1, 0);
+  if (reslen < 0) {
+    perror("受取に失敗");
+    close(sock);
+    exit(1);
+  }
+
+  res[reslen] = '\0';
+
+  printf("Pwned: %s\n", res);
+
+  close(sock);
+  return 0;
+}